Spray nozzle



Nov. 14, 1939. C, L GEBAUER I 2,180,084

SPRAY NOZZLE Filed Feb. 24, 1957 l ATTORNEY.

Patented Nov. 14, 1939 PATENT OFFICE SPRAY NozzLE Charles L. Gebauer,Cleveland, Ohio, assigner to The Gebauer Chemical Company, Cleveland,Ohio, a corporation of Ohio Application February 24, 1937, Serial No.127,472

'1 Claim.

This invention relates to spray nozzles for use in dispensing volatileliquids, for example ethyl chlorid for use in minor surgery. l

In dispensers of this kind the nomle has been made of glass which adaptsitself to production of small capillary openings by the process ofdrawing out a tube. It is however diilicult to make such glass nozzlesand it-is especially difiicult to secure even substantial uniformity ofsize in the capillary opening. 'It is not practical to produce a metalnozzle having a discharge opening as small as is desirable (0.006 inchor less) by the use of drills. About the smallest discharge openingwhich can be practically produced by drilling is .009 or .010 of aninch.

It is one object of the invention to produce a nozzle which may have adischarge opening .009" or .010" in diameter and still be suitable fordispensing volatile liquids such as ethyl chlorid in the form of anatomized spray. Other -and more limited objects will be in part apparentand in part pointed out hereinafter in connection with theaccompanying'drawing wherein Fig. 1 is an elevational view of anV ethylchlorid tube showing the discharge nozzle; Fig. 2 is a sectional viewtaken longitudinally through the nozzle; and Fig. 3 is a'section on theline 3 3 of Fig. 2.

In the drawing, the reference character represents a receptacle adaptedto contain a volatile liquid such as ethyl chlorid. At its upper end,the receptacle A is provided with a valve B for controlling the escapeof the volatile liquid under its own vapor pressure and carries thedischarge nozzle C.

As will be clear from Fig. 2 the nozzle com-K prises a tubular elementhaving an externally threaded portion I0 adapted to be received in aninternally threaded portion in the valve B. and

a knurled collar I I beyond which is an elongated, tapered nose portionI2. A passage extends through the nozzle and is of varying diameter indifferent regions. At the left hand end, the largest passage portionreceives a threaded baille member I3 which preferably is of a size justsmall enough to be received within the passage portion. At the right ofthe nrst mentioned passage portion and adjacent thereto is a reducedpassage portion receiving iibrous material Il which may be cotton, glasswool or the like. At the right of the passage portion which contains thebrous material I4 is an expansion chamber .I 5 of further reduceddiameter adJacent to which is the dischargeorice or capillary passageporl tion I6. The volatile liquid, such as ethyl chloride,which isreceived Within the nozzle is conducted first around the threads of thebaille I3, whereby it is partially vaporized by being forced intocontact with the wall of the nozzle surround- 10 ing the baiiie, thetemperature of said wall being governed by the temperature of thesurrounding atmosphere. This results in vaporizing a portion of thevolatile liquid, and the resultant mixture of the vaporous andunvaporized portions 15 of this liquid is preserved andfurther'vaporization is produced by and during the passage of themixture through the nbrous material I 4.. I he mixture, consisting ofvaporized and unvaporized volatile liquid, then enters. the expansion 20chamber I5, which enables the vaporized portion to eject the unvaporizedportion in the. form of an atomized spray, as distinguished from a jetstream. Furthermore, I am enabled to accomplish this result by the useof capillary discharge g5 'orifices of a size (.009" or .010") whichwould otherwise be ineffective to produce a spray. The

results may be satisfactory for some purposes even though the iibrousmaterial is omitted.

Both the threaded baille I3 and the brous 30 material I4 may be omittedif the discharge'orice is reduced to the order of .006 of an inch orless.

Having thus described my invention, what I claim is: 35

A spray nozzle for volatile liquids comprising an elongated memberhaving a passage extending longitudinally therethrough, a baille elementcomprising a plug fitting in one end ci said passage, said plug havingexternal helical grooves o adjacent the wall of said passage. wherebythe liquid in the grooves will be exposed to the temperature of the saidmember, the other end of said passage being restricted to a capillaryorice, said passage being enlarged behind said oriiice to 5 form anexpansion chamber, and a iilling of brous material in said passage.between said grooved plug and said expansion chamber.

CHARLES L. GEBAUER.

